don't remember Cid ever being outright abusive.

but I didn't think he tossed her around like a ragdoll.


There's more to abuse than just physical abuse. The way Cid yelled and insulted Shera in the first scenes the two of them are in has plenty of verbal and emotional abuse.

Personally, I'd like to think Cid did a turnaround and was better to her after the end of the game or else their canon marriage in the Compilation is not going to end up going downhill sooner or later.